Malicious PDF — malware analysis report

Static analysis result for SHA-256 08096e2b5d99910e…

MALICIOUS

PDF

49.0 KB Created: 2020-08-29 10:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 487844743260ff7b647329220f1431b6 SHA-1: fad18bd58ae51f8b79497220434b63ceb9ab1fc6 SHA-256: 08096e2b5d99910e395a78aa056703a1fd9cd9cdcc4c305342565fa61faee3e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, one of which, https://ttraff.ru/wix?keyword=amulet+of+samarkand+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector points to an attempt to lead the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=amulet+of+samarkand+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/58190924739.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/pobifuxab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/abecedario_en_ingles_pronunciacion_y_escritura.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/emotional_development_in_early_adulthood.pdf
    • https://static.usrfiles.com/ugd/b8c837_72a77c6f42df4815a362f73cc5c5168a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7af82c5fcfa04d7a9313ed814819efd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_559195fe310343769ccc0ecd72120be9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3817d52ff11649bc92c5abae18723297.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2979017001a4e9bbfb78e298b0fcf75.pdf
    • https://static.usrfiles.com/ugd/b8c837_63f930eeefe54607b2a09fbba739838f.pdf
    • https://static.usrfiles.com/ugd/b8c837_17acb46139ee4491971b2177195a64c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffda8f7cd92a40f38722fdf2945ddf2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_42a1d658857f4d34893b47ea1a85923e.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e0.bin
171f2504cbfc6db7166a155d3b2005b04caa4b220db16f24cfe97ae86cab1b43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E0 3976 bytes
font_01_sfnt_off00007ffc.bin
0969150799f1b8bedbde16ca26ba4c122333c31cb47c43e9a8653fbb7cbfb842		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFC 5240 bytes
font_02_sfnt_off000091bd.bin
286ec0e87aa956c2b0dfd36b0da70c7e5644b31e3de39c64c2ae3ddbf78ff5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 10860 bytes

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